JPH09102342A - Face mounting type coaxial connector and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a face mounting coaxial connector reducing the manufacturing cost and preventing a metal broken-out section causing defecting soldering from being exposed on a soldering face. SOLUTION: An outer contact 2 and a center contact 3 are formed on belt- like metal plates, they are connected together by a joint bar section 1, it is punched and insert-molded in a molding die, then two contacts 2, 3 are cut off from the joint bar section 1 respectively. The broken-out sections of lead terminals cut off from the belt-like metal plates are floated above the lead terminals to be soldered, the faces of the lead terminals can be soldered to copper foil pattern faces, and defective soldering can be prevented. This connector is punched in the progressive pressing process, automatic mold machining is facilitated, and the inexpensive face mounting coaxial connector is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface mount type coaxial connector which is attached to an input / output portion of a high frequency device such as a mobile phone and a navigation device which handles a relatively high frequency.

[0002]

2. Description of the Related Art As a conventional surface mount type coaxial connector,
For example, there is a surface mount type coaxial connector as shown in FIGS. FIG. 14 shows a perspective view of a conventional surface mount type coaxial connector, and FIG. 15 shows a sectional view thereof. FIG.
Fig. 3 shows a soldering state diagram in which the lead terminals of this surface-mounted coaxial connector are soldered to the copper foil pattern of the circuit board.

In the figure, 12 is an external contact, 13 is a center contact, and 14 is an insulator for fixing and holding the outer contact 12 and the center contact 13. 12a is a lead terminal for soldering the external contact 12,
The end face is shown at 12e. 13a is a lead terminal for soldering the center contact 13, and 13e is an end face thereof. Further, 5 is a circuit board, and 8 is a copper foil pattern for soldering formed on the circuit board 5.
9 shows a soldering part.

In order to attach the surface-mounted coaxial connector thus constructed to the circuit board 5, soldering lead terminals 12a and 13a are formed on the circuit board 5, respectively, as shown in FIG. It is placed on the existing copper foil pattern 8 and soldered 9. This soldering 9 is generally trowel soldering, but recently, a method of applying cream solder to the soldering portion and performing soldering 9 through a reflow furnace has been adopted.

[0005]

However, in manufacturing such a conventional surface mount type coaxial connector, generally, the resin is injected after fixing the outer contact 12 and the center contact 13 to the molding die. In this manufacturing process, the two contacts, the outer contact 12 and the center contact 13, are paired and fed into the mold so that the center contact 13 is positioned at the center of the outer contact 12. I had to work while checking if I was doing it. This is because the outer contact 12 and the center contact 13 have variations in position due to variations in die size, etc., and the variations cause the center contact 13 to deviate from the center of the outer contact 12. This is because problems such as non-fitting connection may occur during fitting and connection with the connector. For this reason, a die with extremely high dimensional accuracy is required, which makes it difficult to perform insert molding processing by an automatic insert processing machine.

Further, a die having high dimensional accuracy causes an increase in cost of the die, and due to this influence, the cost of a single surface-mount type coaxial connector is increased. In addition, since the outer contact 12 and the center contact 13 are generally formed by punching from separate metal plates, the number of materials taken is wasted. This has also been a factor of increasing the cost of a single surface-mount coaxial connector.

Further, since the surface-mounting type coaxial connector is generally used for high-frequency equipment of high-density mounting, the copper foil pattern 8 formed on the circuit board 5 to which the surface-mounting type coaxial connector is mounted. Had an extremely narrow pattern. Since the surface mount type coaxial connector is soldered to the extremely narrow copper foil pattern 8, the end surfaces 12e and 13e of the lead terminals 12a and 13a of the surface mount type coaxial connector and the copper foil pattern 8 are inevitably soldered. I have to do it. However, the end faces 12e and 13
Since the non-plated fracture surface formed when punching with a mold was exposed at e, it is difficult for solder to adhere to these end faces 12e and 13e, and a lot of time is spent on these soldering operations. There was a problem.

Therefore, an object of the present invention is to solve these problems.

[0009]

According to a first aspect of the present invention, there is provided a surface mount type coaxial connector, wherein a molding portion, a cylindrical outer contact formed in the molding portion, and a central portion of the outer contact are provided. A protruding center contact, an external contact lead terminal formed at the bottom of the external contact and drawn out at a right angle to the external contact, and an external contact lead terminal formed at the bottom of the center contact and drawn out at a right angle to the center contact And a center contact lead terminal.

According to a second aspect of the present invention, there are provided a molding portion, a lead terminal which is drawn out in one direction from one end of the molding portion, and a center contact which is formed by projecting upward from the lead terminal. (F) A method for manufacturing a surface mount type coaxial connector characterized by being formed by the step (b). The outer contact and the center contact, which are respectively connected to the strip-shaped metal plate at the joint bars, are punched. (B) Curling is applied to the external contacts. (C) The center contact is subjected to a drawing process or a winding process. (D) The center contact is provided with a predetermined portion from the terminal side of the external contact to the opposite side of the external contact.
Rotate 0 degrees. (E) Insert molding processing is performed after the processing of (d) above. (F) The external contact and the center contact are cut from the splice portion of the previous term.

According to a third aspect of the present invention, the end portion of the center contact is U-bent upward.

In the present invention, the end portion of the external contact is floated above the surface of the external contact lead terminal.

[0013]

The above technical means operates as follows. Two contacts, an external contact and a center contact, are formed on a strip-shaped metal plate, and the punched products that are connected at the splice bars are placed in a molding die and insert-molded, and then the two connectors are spliced together. By cutting from the portion, it is possible to simplify the confirmation step of confirming whether or not the center contact 13 is located at the center of the external contact 12 at the time of insert processing, which is conventionally required.

Further, the fracture surface of the lead terminal cut from the metal plate is bent by U toward the upper side of the lead terminal to be soldered and floated so that the solder can be attached to the surface of the lead terminal. It is a thing.

[0015]

1 to 13 show an embodiment of the present invention,
Hereinafter, the present invention will be described based on these drawings.

FIG. 1 is a perspective view of a frame punched by a progressive press process in which a contact portion of a connector is continuously formed from a strip-shaped metal plate, and FIG. 2 is a bending of a portion to be an external contact and a drawing of a center contact. FIG. 3 is a perspective view showing a method of winding the center contact, FIG. 4 is a perspective view in which the outer contact is curled from the state of FIG. 2, and FIG. 5 is a state of FIG. From the center contact to the center of the external contact 18
FIG. 6A to FIG. 6D are views for explaining the processing sequence of inserting the center contact into the outer contact, and FIG. 7 is the state shown in FIG. A perspective view of a semi-finished surface mount type coaxial connector that has been processed by insert molding.
FIG. 8 is a cutting process diagram for cutting the surface-mounted coaxial connector processed in FIG. 7 to be a semi-finished product, and FIGS. 9A to 9D show the semi-finished product. It is the figure which showed the detail of the cut part and its sectional view in a product state. 10 is a perspective view showing a completed state of the surface mount type coaxial connector, FIG. 11 is a sectional view of the surface mount type coaxial connector, and FIG. 12 shows lead terminals 2a and 3a of the surface mount type coaxial connector on the circuit board 5. FIG. 14 is a substantial view showing a state where the copper foil pattern 8 is soldered 9, and FIGS. 13A and 13B are detailed explanatory views of the soldering 9.

In these figures, the same parts as in the conventional example and one embodiment of the present invention are designated by the same reference numerals, and the description thereof will be omitted.

The point that the embodiment of the present invention remarkably differs from the conventional example is that the method of forming the two contacts, the outer contact and the center contact, is different. That is, in the conventional surface mount type coaxial connector, two contacts, an external contact and a center contact, are formed on separate metal plates, and are combined in a manufacturing process to perform insert molding to manufacture a surface mount type coaxial connector. There is.

On the other hand, in the surface mount type coaxial connector of the present invention, a strip-shaped metal plate having two contacts, an external contact and a center contact, which are respectively connected by splicing bars, is directly inserted into a molding die. After the insert molding process, the two contacts are each cut from the joint bar to manufacture a surface mount type coaxial connector.

As described above, according to the present invention, by cutting the two contacts from the joint bar after the insert molding process, it is possible to determine whether or not the center contact 13 is located at the center of the external contact 12 during the insert process which is conventionally required. The confirmation step to confirm can be deleted. Further, the fracture surface of the lead terminal cut from the metal plate is U-bent toward the upper side of the lead terminal to be soldered and floated so that the solder can be attached to the surface of the lead terminal. It has a feature.

In FIGS. 10 and 11, 2 is an external contact, 3 is a center contact, 4 is an insulator for fixing and holding the external contact 2 and the center contact 3, and 2
a is a lead terminal for soldering the external contact 2, 3a
Is a lead terminal for soldering the center contact 3.
The outer contact 2 shown in FIG. 10 is formed by pressing a metal plate into a substantially rectangular shape and curling it into a substantially cylindrical shape, and the center contact 3 is formed by pressing a metal plate as described above. It is a thin pin-shaped substantially cylindrical shape that has been processed or rolled. The outer contact 2 and the center contact 3 are made of a resin that serves as an insulator 4 that holds the two contacts in a fixed manner.

A method of manufacturing the surface mount type coaxial connector shown in FIG. 10 will be described below with reference to the drawings of FIGS.

In FIG. 1, P is a strip-shaped metal plate, 1a and 1b are pilot holes used as a guide of a mold when processing the mold, and 1c and 1d are inner and outer punched parts punched by the mold. Reference numeral 1 denotes an internal punching portion 1c by pressing a substantially rectangular flat portion 2'which becomes the outer contact 2 and a substantially circular flat portion 3'which becomes the center contact 3 on a strip-shaped metal plate P. External punching part 1
2a and 2b are external contact lead terminals, 2c is an external contact lead terminal 2a and a joint bar portion 1 by dropping d, and connecting the flat portion 2'and the flat portion 3'partially. 2d is a connecting portion between the external contact lead terminal 2a and the connecting bar portion 3a is a center contact 3
Is a central contact lead terminal that connects the flat portion 3 ′ and the connecting bar portion 1. Further, 3b is a bent portion when bending a flat portion 3'described later.

In the step shown in FIG. 1, the pilot holes 1a, 1a and 1b, 1b are formed in the strip-shaped metal plate P, and the inner punched portion 1c and the outer punched portion 1d are punched with a die to form the external contact 2. The flat portion 2 ′ and the flat portion 3 ′ serving as the center contact 3 are formed in a state of being supported by the connecting bar portion 1. The flat portion 2 ′ that becomes the external contact 2 and the splice 1 are supported by an external contact lead terminal having a predetermined width from one end of the substantially rectangular long side of the flat portion 2 ′ that becomes the external contact 2. It is connected by 2a. The external contact lead terminals 2a are similarly provided with a predetermined width in the same direction as the external contact lead terminals 2a on both sides of the external contact lead terminal 2a with a predetermined distance therebetween, and also have a predetermined length. . However, the external contact lead terminal 2b and the connecting bar portion 1 are not connected. The reason for this is, as described above, the external contact 2
Since the flat portion 2 ′ and the connecting bar portion 1 that are to be supported are sufficient to be supported at one place of the external contact lead terminal 2a,
The connection with the external contact terminal 2b is omitted. Also,
This also improves the efficiency during cutting, which will be described later.

Further, the flat portion 2 serving as the connecting bar portion 1 and the external contact 2 has the external contact lead terminal 2a and the connecting portion 2.
Although connected at d, a step 2c having a size of approximately the plate thickness of the strip-shaped metal plate 1 is formed between them when the inner punching portion 1c is punched.

In the step shown in FIG. 2, along the one end of the long side where the external contact lead terminals 2a and 2b, 2b of the flat portion 2'which will be the external contact 2 left in the step of FIG. 1 are formed. The flat portion 2 ′ is bent and bent upward at a substantially right angle with respect to the strip-shaped metal plate P, using the raised portion as a fulcrum. Further, a substantially cylindrical center contact 3 is formed by drawing downward from the center of the flat portion 3 ′ that becomes the center contact 3.
In this embodiment, the center contact 3 is formed by drawing the flat portion 3 ', but as shown in FIG. 3, the flat contact 3'is pushed downward from above. Later, the flattened flat portion 3'may be formed into a substantially cylindrical shape.

In the step shown in FIG. 4, the outer contact 2 having the flat portion 2'bent upwardly bent at a substantially right angle in the step of FIG. 2 is curled to be formed into a substantially cylindrical shape. In this step, the external contact lead terminals 2a and 2b are bent at right angles from the vicinity of the roots and the flat surfaces 2'are bent so as to be flush with each other.

In the step shown in FIG. 5, the center contact 3 formed in the step of FIG. 2 is placed at the center of the outer contact 2 formed in the step of FIG. As shown in FIGS. 6A to 6D, the method uses the bent portion 3b of the center contact lead terminal 3a as a fulcrum, and bends it downward by 180 ° as indicated by the arrow A. As a result, the center contact 3 is installed at the center of the outer contact 2.

In the step shown in FIG. 7, the resin forming the insulator 4 is injected into the external contact 2 in which the center contact 3 is installed in the step shown in FIG. In the case of this step, it is better to apply a mask or the like to the insulator 4 so as to prevent the insulator 4 from adhering to the inside of the outer contact 2 or the center contact 3 and perform the working operation. Further, it is preferable that the lead terminals used for soldering the external contact lead terminal 3a and the center contact lead terminal 2a are processed so that the insulator 4 does not adhere to them.
The thing of FIG. 7 processed by this process as mentioned above is called a semi-finished product.

In the step shown in FIG. 8, the semi-finished product of the surface mount type coaxial connector processed in the step of FIG. 7 and the joint bar portion 1 are cut. In other words, since the semi-finished product of this surface mount type coaxial connector is connected by the two lead terminals, the external contact lead terminal 3a with the joint bar portion 1 and the center contact lead terminal 2a, these two lead terminals are connected to each other. And cut at the position of c. The cutting method will be described below.

First, the cutting of the center contact lead terminal 3a is performed by cutting the center contact lead terminal 3a as shown in FIG.
Cut from the A'and BB 'positions. The center contact lead terminal 3a processed in this way is as shown in the sectional view of FIG. On the other hand, the external contact lead terminal 2a is cut from the CC ′ position of the connecting bar portion 1 as shown in FIG. 9B. The external contact lead terminal 2a processed in this way is as shown in the sectional view of FIG.

As shown in FIG. 12, the surface mount type coaxial connector completed by the above steps has the external contact lead terminals 2a and the center contact lead terminals 3a on the copper foil pattern 8 formed on the circuit board 5. Each is fixed by soldering 9. At this time, the solder adheres to the plated surfaces of the lead terminals 2a and 3a and the copper foil pattern 8, so that the solder fits in and reliable soldering can be performed.

That is, as shown in FIG. 13A, the soldering 9 between the center contact lead terminal 3a and the copper foil pattern 8 is such that the surface of the bent portion 3b of the center contact lead terminal 3a and the copper foil pattern 8 are separated from each other. Soldered. Further, the soldering 9 between the external contact lead terminal 2a and the copper foil pattern 8 is performed by soldering the surface of the step portion 2c of the external contact lead terminal 2a and the copper foil pattern 8 as shown in FIG. 13B. .

[0034]

According to the present invention, the external contact and the center contact of the surface-mounted coaxial connector are formed on a strip-shaped metal plate, and the external contacts are punched by connecting the splices to each other. The center contact 13 is positioned outside, and the center contact 13 is externally contacted at the time of insert processing, which is conventionally required, by cutting the two connectors from the splicing bars after inserting the same into a molding die and performing insert molding processing. Since the confirmation process for confirming whether or not it is located at the center of 12 can be eliminated, the manufacturing process can be greatly shortened and the molding process can be performed with one insert molding die. Regarding the die dimensional accuracy, since the external contact and the center contact are positioned when punching with the press as described above,
There is no problem with general dimensional accuracy.

Further, since it is not necessary to carry out a press working operation for each terminal, the number of materials taken is not wasted. Therefore, as described above, the automatic molding process can be easily performed, so that the surface mount type coaxial connector can be manufactured at a low cost.

Regarding the soldering of each lead terminal and the copper foil pattern formed on the circuit board, since the surface of each lead terminal and the copper foil pattern surface can be soldered, the solder is easy to adapt. Instant soldering work can be done. Further, soldering can be easily performed even with a copper foil pattern having an extremely narrow width. Therefore, the soldering quality of each lead terminal and the copper foil pattern formed on the circuit board can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a skeleton punched out by a progressive press process for continuously molding a contact portion of a connector from a strip-shaped metal plate according to an embodiment of the present invention.

FIG. 2 is a perspective view in which a portion to be an external contact is bent and a center contact is drawn or wound according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a method of winding the center contact in FIG.

FIG. 4 is a perspective view of an external contact curled from the state of FIG. 2 according to an embodiment of the present invention.

FIG. 5 is a perspective view showing a state in which the center contact is bent 180 ° around the center of the outer contact and installed from the state of FIG. 4 according to an embodiment of the present invention.

FIG. 6 is a view for explaining the processing sequence for installing the center contact on the outer contact in FIG.

FIG. 7 is a perspective view of a semi-finished surface mount type coaxial connector obtained by subjecting the product processed in the state of FIG. 5 according to one embodiment of the present invention to insert molding.

FIG. 8 is a cutting process diagram of cutting the surface-mounted coaxial connector processed in FIG. 7 in a semi-finished product into a completed product according to an embodiment of the present invention.

FIG. 9 is a cross-sectional view of the lead terminals 3a and 2a of the surface-mounted coaxial connector in FIG.

FIG. 10 is a perspective view showing a completed state of the surface mount coaxial connector according to the embodiment of the present invention.

FIG. 11 is a cross-sectional view of a surface mount type coaxial connector according to an embodiment of the present invention.

FIG. 12 is a substantial view showing a state in which the lead terminals 2a and 3a of the surface-mounted coaxial connector according to the embodiment of the present invention are soldered 9 to the copper foil pattern 8 of the circuit board 5.

FIG. 13 is a detailed explanatory diagram of soldering the lead terminals 3a and 2a to the copper foil pattern 8 in FIG.

FIG. 14 is a perspective view of a conventional surface mount type coaxial connector.

FIG. 15 is a cross-sectional view of a conventional surface mount coaxial connector.

FIG. 16 is a lead 22 of a conventional surface mount type coaxial connector.
Solder a and 23a to the copper foil pattern 8 of the circuit board 5 9
It is a substantial view showing the state where it did.

[Explanation of symbols]

 1 splice 1a, 1b pilot hole 1c inner punch 1d outer punch 2 outer contact 2a, 2b external contact lead terminal 2c step 2d connection with splice 1 2e broken surface of external contact lead terminal 2 ' Rectangular flat part 3 Center contact 3a Center contact lead terminal 3b Bent part 3c Center contact Lead terminal folded part 3e Center contact lead terminal broken surface 3'Abbreviated flat part 4 Insulator 5 Circuit board 8 Circuit Board copper foil pattern 9 Soldering P Band-shaped metal plate

Claims (4)

[Claims] 1. A molding part, a cylindrical outer contact formed in the molding part, a center contact formed to project in a central part of the external contact, and a external contact formed in a bottom part of the external contact. A surface mount type coaxial connector, comprising: an external contact lead terminal that is drawn out at a right angle to the center contact; and a center contact lead terminal that is formed at the bottom of the center contact and is drawn out at a right angle to the center contact. 2. A molding part, a cylindrical outer contact formed in the molding part, and a center contact protrudingly formed at the center of the outer contact by the following steps (a) to (f): Method for manufacturing surface-mounted coaxial connector characterized in that (a) punching is performed on each of the strip-shaped metal plates by connecting the external contact and the center contact with a connecting bar portion. (B) Curling is applied to the external contacts. (C) The center contact is subjected to a drawing process or a winding process. (D) The center contact is provided with a predetermined portion from the terminal side of the external contact to the opposite side of the external contact.
Rotate 0 degrees. (E) After the processing of (D), resin is injected to perform insert molding processing. (F) The external contact and the center contact are cut from the splice portion of the previous term. 3. The surface mount type coaxial connector according to claim 1, wherein an end portion of the center contact is U-bent toward the upper side. 4. The surface mount type coaxial connector according to claim 1, wherein an end portion of the external contact is floated above a surface of the external contact lead terminal.